Of course all of student's tired of switch on the electricity whenever the usage is high .And when the student's asking to the teacher about the electricty,they're always say this "we're still working on it,maybe next month or next 3 months ".And i see there's no action at all.Even the issue is far more troublesome now,because when the students or even the teachers are trying to presenting its subject through the projector,the electricity is always down.And of course the student can't concentrate in a uncomfortable hot condition.Even the air conditioner's not a useful thing,because the electricity's always down.Then i got an epiphany while open my facebook,my aunt who's living in Australia is updating status,"Alhamdulillah,no more electircity bill"and i might be wondering why and i ask her,and then she said "The government said there's going to be a carbon tax,so the electricity bill will raise.so the govt is recommending to get a solar panel,because they're good for the enviroment and they lower the carbon emitted into the atmosphere.So i'm started think that "Since my country is not far from Australia,the solar energy is possible here",and my mind is suddenly connected to my school that have a bad or even worse electricity rate.i know this may sound insane,but its for my own school so if i can make it,the electricity bill will drop and the light will never off again.I think this's not a hopeless idea because,i've heard that the government is giving a plenty billion rupiahs for the school facilites and construction.Im not sure if it's gonna work,but at least i give a solution for my school.This is for the student and the next generation school sakes. :)
What is Solar Power ?
The energy of the Sun originates from within the sun itself. Like other stars, the sun is a big ball of gases––mostly hydrogen and helium atoms.
The hydrogen atoms in the sun’s core combine to form helium and generate energy in a process called nuclear fusion.
During nuclear fusion, the sun’s extremely high pressure and temperature cause hydrogen atoms to come apart and their nuclei (the central cores of the atoms) to fuse or combine. Four hydrogen nuclei fuse to become one helium atom. However the helium atom contains less mass compared to four hydrogen atoms that fused. Some matter is lost during nuclear fusion. The lost matter is emitted into space as radiant energy.
It takes countless years for the energy in the sun’s core to make its way to the solar surface, after which slightly over eight minutes to travel the 93 million miles to earth. The solar energy travels to the earth at a speed of 186,000 miles per second, the speed of light.
Only a small portion of the power radiated from the sun into space strikes our planet, one part in two billion. Yet this volume of energy is enormous. Every day enough energy strikes america to provide the nation’s energy needs for one and a half years!
So,how's this thing works?
Solar thermal energy collects the sun's warmth through one of two means: in water or in an anti-freeze (glycol) mixture.
Solar photovoltaic energy converts the sun's radiation to usable electricity.
Listed below are the five most practical and popular ways that solar energy can be used:
1. Small portable solar photovoltaic systems. We have seen these used everywhere, from calculators to solar garden tools. Portable units can be used for everything from RV appliances while single panel systems can be used traffic signs and remote monitoring stations.
2. Solar pool heating. Running water in direct circulation systems via a solar collector is an extremely practical method to heat water for your pool or hot tub.
3. Thermal glycol energy to heat water. In this method (indirect circulation), glycol is heated by the sun's rays and the heat is then transferred to water in a warm water tank. This method of collecting the sun's energy is a lot more practical now than in the past. In areas as far north as Edmonton, Alberta, solar thermal to heat water is economically sound. It can pay for itself in 36 months or less.
4. Integrating solar photovoltaic energy into your home or business power. In numerous parts of the world, solar photovoltaics is an economically feasible solution to supplement the power of your home. In Japan, photovoltaics are competitive with other kinds of power. In america alone, new incentive programs make this form of solar technology ever more viable in many states. A frequent and practical method of integrating solar energy into the power of your home or business is through the usage of building integrated solar photovoltaics.
5. Large independent photovoltaic systems. If you have enough sun power at your site, you might be able to go off grid. You may also integrate or hybridize your solar power system with wind power or other kinds of alternative energy to stay 'off the grid.'
How can Photovoltaic panels work?
Silicon is mounted beneath non-reflective glass to create photovoltaic panels. These panels collect photons from the sun, converting them into DC electric power. The power created then flows into an inverter. The inverter transforms the energy into basic voltage and AC electric power.
Solar cells are prepared with particular materials called semiconductors like silicon, which is presently the most generally used. When light hits the Photovoltaic cell, a certain share of it is absorbed inside the semiconductor material. This means that the energy of the absorbed light is given to the semiconductor.
The power unfastens the electrons, permitting them to run freely. Solar cells also have one or more electric fields that act to compel electrons unfastened by light absorption to flow in a specific direction. This flow of electrons is a current, and by introducing metal links on the top and bottom of the -Photovoltaic cell, the current can be drawn to use it externally.
Fact of the Solar Energy :
- Solar Energy is better for the environment than traditional forms of energy.
- Solar energy has many uses such as electricity production and heating of water through photovoltaic cells and directly for drying clothes.
- Solar energy can also be used to heat swimming pools, power cars, for attic fans, calculators and other small appliances. It produces lighting for indoors or outdoors.
- You can even cook food with solar energy.
- Solar Energy is becoming more and more popular. The worldwide demand for Solar Energy is currently greater than supply.
Facts about Solar Energy usage:
- Solar Energy is measured in kilowatt-hour. 1 kilowatt = 1000 watts.
- 1 kilowatt-hour (kWh) = the amount of electricity required to burn a 100 watt light bulb for 10 hours.
- According to the US Department of Energy, an average American household used approximately 866-kilowatt hours per month in 1999 costing them $70.68.
- About 30% of our total energy consumption is used to heat water.
Facts about Solar Energy systems:
- A home solar system is typically made up of solar panels, an inverter, a battery, a charge controller, wiring and support structure.
- A 1-kilowatt home solar system takes about 1-2 days to install and costs around US$10,000, but can vary greatly and does not take into account any incentives offered by the government.
- A 1-kilowatt home solar system consists of about 10-12 solar panels and requires about 100 square feet of installation area.
- A 1 kilowatt home solar system will generate approximately 1,600 kilowatt hours per year in a sunny climate (receiving 5.5 hours of sunshine per day) and approximately 750 kilowatt hours per year in a cloudy climate (receiving 2.5 hours of sunshine per day).
- A 1-kilowatt home solar system will prevent approximately 170 lbs. of coal from being burned, 300 lbs of CO2 from being released into the atmosphere and 105 gallons of water from being consumed each month!
- About 40 solar cells are usually combined into a solar panel and around 10-12 panels mounted in an array facing due North to receive maximum sunlight.
- The system usually comes with a 5-year warranty, although the solar panels are warranted for 20.
- Relying on the battery back up, a solar energy system can provide electricity 24x7, even on cloudy days and at night.
- Solar panels come in various colours.
- Solar energy can be collected and stored in batteries, reflected, insulated, absorbed and transmitted.
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